diketahui fungsi f(x) = 1-2x dan fungsi g(x) =x2 , tentukanlah a. (fog) (x) = b.(fof) (x) =

jawab

f(x) = 1 - 2x
g(x) = x^2

fog(x) = f { g(x)} = f (x^2)
fog(x) = 1 - 2x²

fof(x) = f { f(x)} = f (1-2x)
fof(x) = 1 - 2(1 - 2x)
fof(x) = 1 - 2 + 4x
fof(x) = 4x - 1